I used a defragger to optimize my computer's performance.

I have used various defraggers to optimize my computer's performance.

The defrayers generously donated money to the charity.

The generous defrayer covered all the expenses for the charity event.

The company made several defrayments to cover the expenses.

The defrayment of the bill was made by credit card.

He was charged with multiple defraudments.

You defraudest me of my money.

He was charged with multiple defraudations.

The expenses for the conference are defrayable by the company.